Are Trends in Specialization Across Arrests Explained by Changes in Specialization Occurring with Age?

The current work uses a sample of serious offenders (N = 2,086) to test the extent to which variation in specialization with age accounts for trends in specialization across arrests. Analyses show that controls for age do not have a large influence on trends across arrest in drug offense specialization or trends across arrest in miscellaneous offense specialization. In contrast, results show that controls for age do influence trends in specialization across arrests for violent offenses and for property offenses. For both of these offense types, trends in specialization across arrests prior to controls for age were positive, while trends in specialization across arrests after controls for age were negative. Results show that many of the trends in specialization across arrests found in the earlier literature are likely influenced by changes in specialization occurring with age.